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    <title>Document</title>
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            border: 1px solid green;
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<body>
    <div id="btn" style="text-align: center; margin:50px">
        <button onclick="start()">点击抽冤种</button>
        <span id="sp"></span>
    </div>
    <table id="class">
        <tr>
            <td id="td1">郑玮喆</td>
            <td id="td2">庄云</td>
            <td id="td3">廖治先</td>
            <td id="td4">郑文源</td>
            <td id="td5">戴俊锋</td>
            <td id="td6">陈昊童</td>
            <td id="td7">谢金金</td>
            <td id="td8">占志新</td>
            <td id="td9">张淑芳</td>
            <td id="td10">刘永潘</td>
        </tr>
        <tr>
            <td id="td11">廖柏成</td>
            <td id="td12">郑宗帅</td>
            <td id="td13">李韦峰</td>
            <td id="td14">吴欣燕</td>
            <td id="td15">陈梅香</td>
            <td id="td16">陈立智</td>
            <td id="td17">袁贵森</td>
            <td id="td18">赵浩敏</td>
            <td id="td19">林世涛</td>
            <td id="td20">罗启恒</td>
        </tr>
        <tr>
            <td id="td21">卢国建</td>
            <td id="td22">黄柱菘</td>
            <td id="td23">陈鹏</td>
            <td id="td24">张耀仁</td>
            <td id="td25">陈华伟</td>
            <td id="td26">张正豪</td>
            <td id="td27">韦仲晓</td>
            <td id="td28">黄富贵</td>
            <td id="td29">陆建锋</td>
            <td id="td30">曾德森</td>
        </tr>
        <tr>
            <td id="td31">吴文龙</td>
            <td id="td32">陆利群</td>
            <td id="td33">黄雄</td>
            <td id="td34">王世财</td>
            <td id="td35">张先杰</td>
            <td id="td36">胡基耀</td>
            <td id="td37">马鑫涛</td>
            <td id="td38">李涛</td>
            <td id="td39">杨凌翔</td>
            <td id="td40">罗此东</td>
        </tr>
        <tr>
            <td id="td41">唐皓颖</td>
            <td id="td42">白婉婷</td>
        </tr>
    </table>
    <script>
        function fn() {
            times++;
            console.log(times);
            for(let i=1 ;i<=42;i++){
                var TD = document.getElementById("td"+i)
                TD.style.backgroundColor="white"
            }
            var num = parseInt(Math.random()*41+1);
            var TD =document.getElementById('td'+num)
            TD.style.backgroundColor='green';
            if(times>= 30 ){
                document.getElementById('sp').innerText="恭喜你,大冤种"+TD.innerText;
                clearInterval(st)
            }
        }
        function start() {
            times = 0;
            document.getElementById('sp').innerText="正在抽冤种....";
            st = setInterval(fn,100);
        }
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